This Windows update was supposed to fix degraded performance with AMD processors. Not sure if it did actually fix the "L3 cache latency bug" but my AMD Ryzen 7 5800H chip in a Lenovo Legion 5 gen 6th laptop, has got even worse.
Windows 10 Cinebench R23 score:
CPU (Multi Core) 13030 pts
Windows 10 Time Spy Score:
Graphics: 11,116
CPU: 8,988
Windows 11 after latest Update Cinebench R23
CPU (Multi Core) 12230 pts
Windows 11 after latest Update Time Spy
Graphics: 11, 110
CPU: 8,631
I also downloaded AMD Chipset Software 3.10.08.506 to fix issue but didn't seem to make much difference on scores for these. I also have turned off Core Isolation.